I have Hero TX (non-ST), it's quite nice, but I can't properly reach the ground with my feet if I recline on the lowest height setting and I'm 179cm tall.
Same here. I'm 176, bought Icon TX and can barely plant my feet on the floor. The seat's also slightly leaning to the back, so at the beginning it was 'digging' into the back of my knees.
Apart from that, there are a few more things IMO Noblechairs could do to improve their products:
-swap those base pillows for the memory foam ones (the lumbar pillow is super thick so I just tossed it somewhere - can't imagine anyone using it)
-the armrests could be just tad softer
-the chair's base is edgy, so resting Your feet on it can hurt after few minutes
And finally - the tilting mechanism started creaking terribly after around 2 months. Such things should not happen in a 400€ chair!